Turn VTT subtitles into SMI. It is converted in your browser, so the file never leaves your device.
Drop VTT files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop VTT (WebVTT) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the SMI, or download everything as one ZIP if you converted several files.
The VTT to SMI converter is part of this page and runs inside your browser. Your subtitles are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
VTT is less widely accepted than SRT by desktop players and editors. SMI can carry several languages in one file for the players that read it. VTT is at home in captions on web pages and in HTML video players; SMI is the usual choice for subtitles for Korean-market players and multilingual files.
The text is read as UTF-8 or UTF-16, whichever the file is. An older file in another code page is read using the charset it declares, or as Windows-1252 if it declares none, so accented letters in an unlabelled legacy file can come out wrong. A file that is not text, such as the picture-based subtitles of a DVD, is refused instead of being converted to nonsense. Of the styling, only italic, bold, underline and the position on screen (top, middle or bottom, left, centre or right) travel between formats; fonts, colours, outlines and effects do not. WebVTT comments, STYLE blocks and region definitions are skipped; the cues, their text and positions are kept. The file is written with one language class, and cues that overlap in time are shown together, as SAMI has a single timeline.
WebVTT is the caption format of HTML5 video. It looks like SRT with a WEBVTT header and a full stop in the timestamps, but also supports positioning, styling with CSS, chapters and metadata. Browsers display it natively.
Opens in Web browsers (the HTML track element), YouTube, Vimeo, VLC and streaming players
VTT converterSAMI is an HTML-like subtitle format from Microsoft, with each cue a SYNC tag holding the start time in milliseconds. It can hold several languages in one file, selected by style class. It is most common in South Korea.
Opens in Windows Media Player, KMPlayer, PotPlayer, VLC and Korean-market players
SMI converter| VTTWebVTT subtitles | SMISAMI subtitles | |
|---|---|---|
| Stands for | Web Video Text Tracks | Synchronized Accessible Media Interchange |
| Type | Subtitles | Subtitles |
| Compression | None | None |
| Introduced | 2010, by the WHATWG and W3C | The late 1990s, by Microsoft |
| Opens in | Web browsers (the HTML track element), YouTube, Vimeo, VLC and streaming players | Windows Media Player, KMPlayer, PotPlayer, VLC and Korean-market players |
| Best for | Captions on web pages and in HTML video players | Subtitles for Korean-market players and multilingual files |
| File extension | .vtt, .webvtt | .smi, .sami |
No. The VTT to SMI conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
No further quality is lost: SMI stores the decoded audio exactly. The result is identical in content.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the VTT file, press Convert and save the SMI. There is nothing to install.
Yes, but a subtitle file is small. Files up to 50 MB are accepted, far more than any real subtitle file. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.